Netherlands fertility doctor used own sperm to father 21 children

Investigation into Jos Beek matches his DNA with children of mothers he treated between 1973 and 1986

A gynaecologist in the Netherlands conceived 21 children and potentially dozens more using his own sperm after prospective parents turned to him for fertility treatment, an investigation has discovered.

Jos Beek worked at Elisabeth hospital in Leiderdorp, now part of Alrijne hospital, between 1973 and 1998. He died in 2019.